Section Safety image/svg+xml DANGER image/svg+xml Electrical Shock Hazard Do not examine, connect, or disconnect wiring on an energized drive. Before servicing, disconnect all power to the equipment and wait for the time specified on the warning label at a minimum. The internal capacitor stays charged after the drive is de-energized. The charge indicator LED extinguishes when the DC bus voltage decreases below 50 Vdc. When all indicators are OFF, remove the covers before measuring for dangerous voltages to make sure that the drive is safe. If you do work on the drive when it is energized, it will cause serious injury or death from electrical shock. image/svg+xml DANGER image/svg+xml Fire Hazard Install an Earth Leakage Circuit Breaker (ELCB) on the power supply side to prevent damage to the power supply system if there is a short circuit, to provide overload protection for wiring, to prevent electrical shock, and to provide ground fault protection against earth leakage fires. You can install a molded-case circuit breaker (MCCB) as a replacement for an ELCB that is upstream in the power supply system. If you do not install ELCB or MCCB, it can cause serious injury or death. image/svg+xml Warning image/svg+xml Electrical Shock Hazard Do not operate the drive when covers are missing. Replace covers and shields before you operate the drive. Use the drive only as specified by the instructions. Some figures in this section include drives without covers or safety shields to more clearly show the inside of the drive. If covers or safety shields are missing from the drive, it can cause serious injury or death. image/svg+xml Warning image/svg+xml Electrical Shock Hazard Ground the neutral point on the power supply of drive models 2xxxB/C and 4xxxB/C to comply with the EMC Directive before you turn on the EMC filter. If you turn ON the EMC filter, but you do not ground the neutral point, it can cause serious injury or death. image/svg+xml Warning image/svg+xml Crush Hazard Make sure that the protective ground wire complies with technical standards and local safety regulations. The IEC/EN 61800-5-1 standard specifies that you must wire the power supply to automatically de-energize when the protective ground wire disconnects. You can also connect a protective ground wire that has a minimum cross-sectional area of 10 mm2 (copper wire) or 16 mm2 (aluminum wire). The leakage current of the drive will be more than 3.5 mA in drive models; 2xxxB 2xxxC 4002B to 4371B 4002C to 4371C (with built-in EMC filter turned ON) 4389 to 4H12 If you do not obey the standards and regulations, it can cause serious injury or death. image/svg+xml Warning image/svg+xml Electrical Shock Hazard When there is a DC component in the protective earthing conductor, the drive can cause a residual current. When a residual current operated protective or monitoring device prevents direct or indirect contact, always use a type B Earth Leakage Circuit Breaker (ELCB) as specified by IEC/EN 60755. If you do not use the correct ELCB, it can cause serious injury or death. image/svg+xml Warning image/svg+xml Electrical Shock Hazard Do not wear loose clothing or jewelry when you do work on the drive. Tighten loose clothing and remove all metal objects, for example watches or rings. Loose clothing can catch on the drive and jewelry can conduct electricity and cause serious injury or death. image/svg+xml Warning image/svg+xml Electrical Shock Hazard Do not remove covers or touch circuit boards while the drive is energized. If you touch the internal components of an energized drive, it can cause serious injury or death. image/svg+xml Warning image/svg+xml Electrical Shock Hazard Only let approved personnel install, wire, maintain, examine, replace parts, and repair the drive. If personnel are not approved, it can cause serious injury or death. image/svg+xml Warning image/svg+xml Electrical Shock Hazard Do not modify the drive body or drive circuitry. Modifications to drive body and circuitry can cause serious injury or death, will cause damage to the drive, and will void the warranty. Yaskawa is not responsible for modifications of the product made by the user. image/svg+xml Warning image/svg+xml Fire Hazard Tighten all terminal screws to the correct tightening torque. Connections that are too loose or too tight can cause incorrect operation and damage to the drive. Incorrect connections can also cause death or serious injury from fire. image/svg+xml Warning image/svg+xml Fire Hazard Tighten screws at an angle in the specified range shown in this manual. If you tighten the screws at an angle not in the specified range, you can have loose connections that can cause damage to the terminal block or start a fire and cause serious injury or death. image/svg+xml Warning image/svg+xml Damage to Equipment Do not apply incorrect voltage to the main circuit of the drive. Operate the drive in the specified range of the input voltage on the drive nameplate. Voltages that are higher than the permitted nameplate tolerance can cause damage to the drive. image/svg+xml Warning image/svg+xml Fire Hazard When you install a dynamic braking option, wire the components as specified by the wiring diagrams. Incorrect wiring can cause damage to braking components or serious injury or death. Notice image/svg+xml Do not let unwanted objects, for example metal shavings or wire clippings, fall into the drive during drive installation. Put a temporary cover over the drive during installation. Remove the temporary cover before start-up. Unwanted objects inside of the drive can cause damage to the drive. Notice image/svg+xml Damage to Equipment When you touch the drive and circuit boards, make sure that you observe correct electrostatic discharge (ESD) procedures. If you do not follow procedures, it can cause ESD damage to the drive circuitry. Notice image/svg+xml Select a motor that is compatible with the load torque and speed range. When 100% continuous torque is necessary at low speed, use an inverter-duty motor or vector-duty motor. When you use a standard fan-cooled motor, decrease the motor torque in the low-speed range. If you operate a standard fan-cooled motor at low speed and high torque, it will decrease the cooling effects and can cause heat damage. Notice image/svg+xml Obey the speed range specification of the motor as specified by the manufacturer. When you must operate the motor outside of its specifications, contact the motor manufacturer. If you continuously operate oil-lubricated motors outside of the manufacturer specifications, it can cause damage to the motor bearings. Notice image/svg+xml When the input voltage is 440 V or higher or the wiring distance is longer than 100 m (328 ft), make sure that the motor insulation voltage is sufficient or use an inverter-duty motor or vector-duty motor with reinforced insulation. Motor winding and insulation failure can occur. Notice image/svg+xml Damage to Equipment Before you connect a dynamic braking option to the drive, make sure that qualified personnel read and obey the Braking Unit and Braking Resistor Unit Installation Manual (TOBPC72060001). If you do not read and obey the manual or if personnel are not qualified, it can cause damage to the drive and braking circuit. Notice image/svg+xml Make sure that all connections are correct after you install the drive and connect peripheral devices. Incorrect connections can cause damage to the drive. Note: Torque characteristics are different than when you operate the motor directly from line power. Make sure that you understand the load torque characteristics for the application. The current rating of submersible motors is usually higher than the current rating of standard motors for a given motor power. Make sure that the rated output current of the drive is equal to or more than the current rating of the motor. If the motor wire length is longer than 100 m (328 ft), select the correct wire gauge to adjust for a loss in voltage and prevent loss of motor torque. Do not use unshielded wire for control wiring. Use shielded, twisted-pair wires and ground the shield to the ground terminal of the drive. Unshielded wire can cause electrical interference and unsatisfactory system performance.
